Network Instruments GigaStor User Manual page 70

Observer without reserved memory is the default, but not recommended, configuration. It is the default because
each network is unique and you must determine how you want Observer to be configured for your system.
This section does not apply to the GigaStor or other hardware products from Network Instruments. They are
properly configured at the factory.
If you need more RAM for the statistics queue buffer, you may need to lower the amount of RAM dedicated to
packet capture so that it is freed and available to add to the statistics queue.
After you install Observer and first open the program it does not have any reserved memory. Observer allocated
a portion of the available protected memory for its use. This creates a "Windows memory pool" for Observer
of about 50 to 80 MB (depending on the amount available from Windows, and cannot be increased). This is a
limitation of the Windows memory pool and the Windows operating system.
Single Probes, unlike Multi-Probes and Expert Probes, cannot use reserved memory because of their design.
1. Click the Memory Management tab to display the list of probe instances and their buffer sizes.
2. Click the Configure Memory button at the top of the window to view and modify how Observer uses the
protected memory for this probe instance. The Edit Probe Instance window opens.
On the Edit Probe Instance window, you can see how memory is allocated for:
Packet capture
Statistics queue buffer
You can also see how much protected memory is still available in the Windows memory pool.
Figure 16: Edit Probe Instance
3. Use the arrows to the right of the Packet capture and Statistics queue buffer to increase or decrease the
amount of RAM you want dedicated to each. See
to divide the memory.
4. Click View to see the different types of networks and how the memory is allocated to the numerous statistics
collected by Observer. See
why you may want to change some allocations.
70 | GigaStor™ (pub. 25.Apr.2014)
How to allocate the reserved RAM
Tweaking the statistics memory configuration
to help determine how
for details about the window and